MOVED: Going it alone, Australia Sept 13

Looking at going out to Sydney at start of September on my own on a working holiday visa for the year. Visa is all sorted, but just looking for a bit of advise on flights. I know its probably been done to death but where is best place to get a cheap open return flight from? And is this best ticket to buy?

Really looking forward to it and think once flights are sorted, it will definitely feel a lot more real and even more exciting. Anybody going at same time? If so get in touch and any other advise would be really good as well.